New variables in M5 (NGC 5904) and some identification corrections

TL;DR

This study reports twelve new variable stars in M5, corrects previous misidentifications, and analyzes uncertain variables, enhancing the understanding of stellar variability in this globular cluster.

Contribution

The paper introduces twelve newly identified variables in M5 and provides corrected identifications for previously misclassified stars, improving the cluster's variable star catalog.

Findings

Twelve new variables identified in M5.

Corrected identifications for previously misclassified stars.

Analysis of uncertain variable candidates.

Abstract

We report twelve variables not previously detected in the globular cluster M5 (NGC 5904); one SX Phe and eleven semi-regular variables (SR). Their identifications, equatorial coordinates, ephemerides, and light curves are given. Furthermore, we have explored the light curves of a group of stars whose variability has not been confirmed and that are marked as probable non- variables in the CVSGC. Finally, we offer detailed identifications for some of the known variables in crowded regions that were misidentified in previous studies. We shall also address the cases of the cataclysmic variable or U Gem type V101 and of the variable blue straggler V159.